6722981 has 4 divisors (see below), whose sum is σ = 6823392. Its totient is φ = 6622572.

The previous prime is 6722957. The next prime is 6722987. The reversal of 6722981 is 1892276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6722981 - 2¹⁴ = 6706597 is a prime.

It is a super-2 number, since 2×6722981² = 90396947052722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6722987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50105 + ... + 50238.

It is an arithmetic number, because the mean of its divisors is an integer number (1705848).

Almost surely, 2^6722981 is an apocalyptic number.

It is an amenable number.

6722981 is a deficient number, since it is larger than the sum of its proper divisors (100411).

6722981 is a wasteful number, since it uses less digits than its factorization.

6722981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100410.

The product of its digits is 12096, while the sum is 35.

The square root of 6722981 is about 2592.8711884704. The cubic root of 6722981 is about 188.7356587499.

The spelling of 6722981 in words is "six million, seven hundred twenty-two thousand, nine hundred eighty-one".